.page-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  align-items: start;
}

@media (max-width: 820px) {
  .page-grid {
    grid-template-columns: 1fr;
  }
}

.input-section {
  padding: 12px 16px;
}

.field-label {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 5px;
  display: block;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.result-box {
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: 3px;
  padding: 12px;
  margin-top: 12px;
}

.result-title {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 10px;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 10px;
}

.r-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 9px 11px;
}

.r-label {
  font-size: 9px;
  color: var(--dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 3px;
}

.r-val {
  font-size: 1.05rem;
  font-family: 'IBM Plex Mono';
  color: #fff;
}

.r-unit {
  font-size: 9px;
  color: var(--dim);
}

.planet-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin-bottom: 10px;
}

.planet-btn {
  padding: 5px 3px;
  font-size: 10px;
  text-align: center;
  cursor: pointer;
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: 3px;
  color: var(--dim);
  font-family: 'IBM Plex Mono', monospace;
  transition: all 0.15s;
}

.planet-btn:hover:not(.disabled) {
  border-color: var(--text);
  color: var(--text);
}

.planet-btn.sel {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(255, 184, 63, 0.07);
}

.planet-btn.disabled {
  opacity: 0.25;
  cursor: not-allowed;
  pointer-events: none;
}

.top-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  padding: 10px 20px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--dim);
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.15s;
  margin-bottom: -1px;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--green);
  border-bottom-color: var(--green);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.body-select {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.body-sel-btn {
  padding: 6px 4px;
  font-size: 10px;
  text-align: center;
  cursor: pointer;
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: 3px;
  color: var(--dim);
  font-family: 'IBM Plex Mono', monospace;
  transition: all 0.15s;
}

.body-sel-btn:hover {
  border-color: var(--text);
  color: var(--text);
}

.body-sel-btn.sel {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(79, 195, 247, 0.06);
}

.err-msg {
  font-size: 11px;
  color: var(--red);
  padding: 8px 0;
  display: none;
}

.err-msg.show {
  display: block;
}

.canvas-wrap {
  position: relative;
  background: #000;
}

canvas {
  display: block;
  width: 100%;
}

.canvas-overlay {
  position: absolute;
  top: 9px;
  left: 12px;
  font-size: 11px;
  color: #39ff8566;
  pointer-events: none;
  line-height: 1.9;
  font-family: 'IBM Plex Mono', monospace;
}

.ov-val {
  color: var(--amber);
}

.canvas-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 13px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

.play-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 1px solid var(--border2);
    background: transparent;
    color: var(--green);
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.15s;
    flex-shrink: 0;
}


.play-btn:hover {
    border-color: var(--green);
}

.ctrl-lbl {
    font-size: 11px;
    color: var(--dim);
}